Drill wagon for transporting and erecting rock drilling rigs

ABSTRACT

Drill wagon for transporting and erecting rock drilling rigs with a mobile undercarriage and an obliquely upwardly directed boom secured to the undercarriage. A drill feed frame is pivotally mounted to the free end of the boom. One or more support legs capable of being raised and lowered hydraulically are mounted to the undercarriage. The feed frame is adapted to be pivoted from side to side, the undercarriage is supported by two wheel bogies which are pivotally mounted approximately at the centre of their length and which are pivotable about an axis transversely of the longitudinal axis of the undercarriage. The bogies are pivotable independently of one another by means of respective motors, preferably hydraulic cylinders.

United States Patent Reiersdal [76] Inventor: Olav Reiersdal, SandvatanSt. 4480, Kvinesdal, Norway [22] Filed: Oct. 1, 1973 [21] Appl. No.:402,535

[30] Foreign Application Priority Data Oct. 26, 1972 Norway 3864/72 [52]U.S. Cl 173/23; 173/43 [51] Int. Cl. E214: 11/02 [58] Field of Search173/23, 28, 43; 180/8 R [56] References Cited UNITED STATES PATENTS2,828,137 3/1958 Wagner 173/22 X 3,045,771 7/1962 Curtis 173/22 X3,088,531 5/1963 Garrett et al. 173/43 X 3,189,103 6/1965 Attebo et al.173/22 X 3,565,184 2/1971 Gustafsson et a1 173/28 3,809,344 5/1974Kolderup 173/43 X FOREIGN PATENTS OR APPLICATIONS 116,799 5/l969 Norway173/22 [451 Apr. 15, 1975 Primary Examiner-Frank L. Abbott AssistantExaminer-Richard E. Favreau Attorney, Agent, or Firm-Ladas, Parry, VonGehr, Goldsmith & Deschamps [57] ABSTRACT Drill wagon for transportingand erecting rock drilling rigs with a mobile undercarriage and anobliquely upwardly directed boom secured to the undercarriage. A drillfeed frame is pivotally mounted to the free end of the boom. One or moresupport legs capable of being raised and lowered hydraulically aremounted to the undercarriage. The feed frame is adapted to be pivotedfrom side to side, the undercarriage is supported by two wheel bogieswhich are pivotally mounted approximately at the centre of their lengthand which are pivotable about an axis transversely of the longitudinalaxis of the undercarriage. The bogies are pivotable independently of oneanother by means of respective motors, preferably hydraulic cylinders.

3 Claims, 3 Drawing Figures DRILL WAGON FOR TRANSPORTING AND ERECTINGROCK DRILLING RIGS The present invention relates to a drill wagon fortransporting and erecting rock drilling rigs, the wagon being providedwith a mobile undercarriage and obliquely upwardly projecting boomsecured thereto and having a pivotable drill feed frame at the free endof the boom.

Drill wagons are previously known of this type where the undercarriageis supported by two wheels and is provided with one or more support legscapable of being raised and lowered hydraulically, the feed frame beingadapted to pivot from side to side. Such a drill wagon is described inNorwegian Pat. No. 1 16,799. The prior art in regard to this type ofdrilling wagon is that the feed frame is driven as propelling member, itbeing pivotally mounted on the free end, and capable of movement bymeans of a hydraulic cylinder. When the drill wagon is to be drivenforwardly, it is supported by the two wheels and the support leg and, inthis position, the feed frame can be pivoted forwardly and lowered intocontact with the ground, the support leg being withdrawn. With thesupport leg in raised position, the feed frame is bent inwardly towardthe undercarriage and, during this movement, the drill wagon is pulledtowards the feed frame, supported by the wheels. When the undercarriagehas arrived as close as possible to the feed frame, the support leg isdisposed against the ground and presses the feed frame upwardly fromcontact with the ground, and the whole operation is repeated. In thatthe feed frame may be pivoted from side to side, the path may be changedand the position at the location of operation is readily reached.

Even though the above described rig has good progress capability inrough terrain, there is a limit to the type of obstacles which can beovercome, and also to the inclination of the terrain on which the rigcan be erected. It is difficult, for example, for the rig to pass overlarge rocks or step-shaped obstacles in the terrain. It is alsodangerous to drive along a steep incline. It is also dangerous to erectthe rig for drilling on too great an incline, since the centre ofgravity of the rig will then be far out to the side of theundercarriage.

The aim ofthe present invention is to provide an improvement in a drillwagon of the type described hereinabove. so that it has much greatercapacity for progress in particularly rough terrain and so that it canbe erected for drilling on steep inclines.

In accordance with the invention, this is achieved by a drill wagon fortransporting and erecting rock drilling rigs, having a mobileundercarriage and an obliquely upwardly directed boom secured thereto,and a pivotable feed frame at the free end of the boom, the said drillwagon being characterized by the combination of the following featureswhich are known per se:

that one or more legs, capable of being raised and loweredhydraulically, are mounted to the undercarriage,

that the feed frame is adapted to pivot from side to side,

that the undercarriage is supported by two wheel bogies which arepivotally mounted approximately at the centre of their length(longitudinal direction thereof) and which are pivotal about an axistransversely of the longitudinal direction of the wagon,

and that the bogies are independently pivotable with respect to oneanother by means of separate motors. preferably hydraulic cylinders.

The hydraulic cylinders are mounted horizontally and engage respectivebogies over the centre of rotation thereof so that the bogies may bepivoted approximately The invention is further explained in thefollowing with reference to the drawing where,

FIG. 1 is an embodiment example of the invention viewed in perspective.

FIG. 2 is the same embodiment example during progress in difficultterrain and FIG. 3 is the same embodiment example erected for drillingin steeply inclined terrain.

The drill wagon consists of a predominantly V- shaped frame 1, to therearwardly directed arms 2, 3 of which pivotal wheel bogies 4, 5 aresecured. The bogies are rotatable about a shaft 6 and are, at their freeends. provided with drive wheels 7, 8. Between the said two wheels,further wheels 9, 10 may be mounted of somewhat smaller diameter thanthe wheels 7, 8 so that, on even ground, the wheels 9, 10 are not incontact with the ground. Each bogie 4, 5 is provided with an arm 11which projects upwardly above the centre of rotation 6. A hydrauliccylinder 12 engages the said arm so that the bogies can be rotated invertical plane, independently of one another.

ln known manner, the drill wagon is further supported by a support leg13 which is adapted to be raised or lowered by means of a hydrauliccylinder 14. Further, the drill wagon has a forwardly directed boom I5at the free end of which a feed frame 16 is mounted for a drilling rig17. The feed frame 16 may be pivoted from side to side by means of ahydraulic cylinder 18. The bogies are sufficiently short and arrangedsufficiently far out at the end of the undercarriage opposed to theboom, that the plumb-line through the center of gravity of the entire isoutside the support surface of the bogies.

If a steep obstacle is to be overcome, the rig is brought close to theobstacle and the forward wheels on both bogies are raised so that thebogies rest on the rear wheels as adjacent as possible to the obstacle.The rig is then pulled further forward so that the fore wheels of thebogies are engaged at the top of the obstacle. The rear wheels arethereafter raised, the fore wheels resting meanwhile on top of theobstacle. When the bogies are approximately in horizontal position, bothbogies are pulled in onto the top of the obstacle by means of the feedframe.

It is also possible to move the bogies one at the time onto an obstacleas illustrated on FIG. 2. The bogies 4, 5 are here pivoted such that theundercarriage l is raised and the entire drill wagon is supported by therear wheels 8 on the bogie, the forward wheels 7 resting on the edge ofthe steep obstacle. In this position, one bogie, for example, 5, ispivoted to approximately normal horizontal position. The drill feedframe 16 is then pivoted to the left so that the fore wheel 7 on thebogie 5 rolls over the top of the steep obstacle. Thereafter, the bogie4 can be pivoted back to vertical position and the fore wheel on thebogie 4 made to roll inwardly in that the feed frame 16 is pivoted tothe right. The drill wagon according to the invention may then climbequally well down over rough terrain as upwardly, the

operation being carried out in opposite sequence of that describedhereinabove.

in FIG. 3 it is seen how the drill wagon according to the invention canbe erected for drilling on inclined terrain. The bogie 4 located at thetop of the incline rests against the ground in normal horizontalposition. The second bogie 5 is rotated so that it is in a more verticalposition and such that the rear wheel usually rests on the ground. Inthis manner. it is possible to compensate for inclines in the terrainwhile retaining normal horizontal position of the drill wagon.

During normal driving. where the terrain is not too difficult, thehydraulic pressure on the cylinders 12 may be disconnected so that thedrill wagon moves forward in normal manner supported by the wheel bogies4, 5 which give the drill wagon an improved mobility in the terrain thanconventional single wheels, as described in Norwegian patent No. 116.799. During driving. the operator stands behind the motor housing 19and the various movements are carried out by means of a plurality oflevers 20 by means of which hydraulic control valves can be operated forthe different cylinders.

Having described my invention, I claim:

1. An improved drill wagon for transporting and erecting rock drillingrigs comprising a mobile undercarriage and an obliquely upwardlydirected boom secured thereto, a drill feed frame pivotally mounted tothe free end of the boom, and at least one support leg mounted on theundercarriage and capable of being raised and lowered hydraulicallywherein the improvement comprises the following further features incombination':

a. two bogies are provided for the undercarriage. said bogies beingpivotally mounted approximately at the centre of their length and beingpivotable about an axis transverse to the longitudinal axis of theundercarriage b. said bogies are pivotable independently of one anotherrespective driving means, and

c. said bogies are sufficiently short and arranged sufficiently far outat the end of the undercarriage opposed to the boom. that the plumb-linethrough the centre of gravity of the entire apparatus is outside thesupport surface of the bogies.

2. Drill wagon according to claim I in which the driving means for saidbogies comprises hydraulic cylinders arranged horizontally andrespectively engaging the bogies through an arm projecting over thecenter of rotation, so that the bogies can be rotated throughapproximately 3. Drill wagon according to claim 1, in which each bogieis provided with drive wheels at the ends thereof. and is also providedwith wheels of smaller diameter than the drive wheels located betweensaid drive

1. An improved drill wagon for transporting and erecting rock drillingrigs comprising a mobile undercarriage and an obliquely upwardlydirected boom secured thereto, a drill feed frame pivotally mounted tothe free end of the boom, and at least one support leg mounted on theundercarriage and capable of being raised and lowered hydraulicallywherein the improvement comprises the following further features incombination: a. two bogies are provided for the undercarriage, saidbogies being pivotally mounted approximately at the centre of theirlength and being pivotable about an axis transverse to the longitudinalaxis of the undercarriage b. said bogies are pivotable independently ofone another respective driving means, and c. said bogies aresufficiently short and arranged sufficiently far out at the end of theundercarriage opposed to the boom, that the plumb-line through thecentre of gravity of the entire apparatus is outside the support surfaceof the bogies.
 2. Drill wagon according to claim 1 in which the drivingmeans for said bogies comprises hydraulic cylinders arrangedhorizontally and respectively engaging the bogies through an armprojecting over the center of rotation, so that the bogies can berotated through approximately 180*.
 3. Drill wagon according to claim 1,in which each bogie is provided with drive wheels at the ends thereof,and is also provided with wheels of smaller diameter than the drivewheels located between said drive wheels.